CN204669067U - Utilize the solar power supply apparatus of super capacitor prolonging service life of battery - Google Patents

Abstract

The utility model relates to a battery protection technology, in particular to a solar power supply device which utilizes a supercapacitor to prolong the service life of a storage battery. It includes a solar panel, the solar panel is connected to the battery and the super capacitor through the battery charging circuit and the super capacitor charging circuit respectively, the battery and the super capacitor are connected to the power conversion circuit through the voltage comparison circuit, and the power conversion circuit is connected to the electrical equipment. The utility model organically combines the long life of the supercapacitor with the large capacity of the storage battery, which not only ensures the normal operation of the equipment, but also greatly prolongs the working life of the storage battery. It has great practical value and is a conventional solar power supply An important technological advance in electrical circuits.

Description

Solar power supply device using supercapacitor to prolong battery life

technical field

The utility model relates to a battery protection technology, in particular to a solar power supply device which utilizes a supercapacitor to prolong the service life of a storage battery.

Background technique

Existing solar charging and power supply circuits mostly use solar panels to directly charge storage batteries through conversion circuits, and storage batteries directly supply power to electrical equipment through power conversion circuits. The existing mature batteries used with solar energy are mainly lead-acid batteries, lithium batteries, nickel-metal hydride batteries, etc. Most of the existing solar charging and power supply circuits directly charge the accumulator through the charging circuit by the solar panel, and the accumulator directly supplies power to the electrical equipment through the power conversion circuit. The existing mature batteries used with solar energy are mainly lead-acid batteries and lithium batteries. This power supply method has the following disadvantages:

At present, the charge and discharge times of lead-acid batteries and lithium batteries are about 300-500 times. If calculated based on one cycle of charge and discharge per day, the normal service life is less than 2 years, which is comparable to the 20-year service life of solar panels. The ratio is very mismatched, which seriously restricts the working life and popularization and application of solar power supply equipment.

The capacity of various supercapacitors launched in the market recently can reach hundreds of farads. Some micro-power consumption places use this kind of supercapacitor as a battery. Generally, it cannot meet the power demand of conventional electronic equipment for long-term work under severe weather conditions such as continuous rainy days, and the cost is too high, and it has not been widely used.

Utility model content

In order to solve the deficiencies in the above technical problems, the purpose of this utility model is to provide a solar power supply device that can overcome the above deficiencies and prolong the life of the storage battery by using a super capacitor.

The utility model comprises a solar battery panel, the solar battery panel is connected to the battery and the super capacitor through the battery charging circuit and the super capacitor charging circuit respectively, the battery and the super capacitor are connected to the power conversion circuit through the voltage comparison circuit, and the power conversion circuit is connected to the electric equipment.

Preferably, the supercapacitor voltage is greater than the battery voltage.

The battery and the supercapacitor are charged at the same time through the solar panel, and the voltage of the battery and the supercapacitor is compared through the voltage comparison circuit, and the one with the higher voltage is used as the power supply output to supply power to the electrical equipment.

Compared with the prior art, the utility model has the following beneficial effects:

Combining the long life of the supercapacitor and the large capacity of the battery organically, it not only ensures the normal operation of the equipment, but also greatly prolongs the working life of the battery. It has great practical value and is one of the conventional solar power supply circuits. important technological advances.

Description of drawings

Fig. 1 schematic diagram of device block in the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is further described:

The utility model charges the accumulator and the supercapacitor at the same time through the solar panel, and the accumulator and the supercapacitor perform voltage comparison through a voltage comparison circuit, and the one with the higher voltage is used as a power supply output to supply power to electric equipment.

The specific device for completing this method includes a solar panel as shown in Figure 1, the solar panel is connected to the storage battery and the super capacitor through the battery charging circuit and the super capacitor charging circuit respectively, the storage battery and the super capacitor are connected to the power conversion circuit through the voltage comparison circuit, and the power conversion Circuit connection electrical equipment.

The solar panels charge the supercapacitor and the battery separately. The super capacitor voltage is higher than the battery voltage. When the solar panel is charged in the sun, due to the small capacity of the supercapacitor and the characteristics of high charging efficiency and fast speed, the supercapacitor is fully charged first, and then the battery is fully charged.

When the equipment needs power supply, the supercapacitor is used first due to the high voltage. The capacity of the supercapacitor is designed to meet the day and night power consumption needs of the electrical equipment when the solar panel battery is used in sunny days. There is no need to discharge the battery again, thus greatly reducing The number of times the battery works.

When encountering bad weather such as cloudy and rainy days, since the solar panel battery cannot charge the battery or supply power to the equipment at this time, the voltage of the super capacitor will drop after it is used up or used to a certain limit. The voltage comparison is the voltage of the super capacitor and the battery The voltage is compared as an input, and the one with the higher voltage is determined to supply the output. The large-capacity battery starts to play a role and continues to supply power to the equipment to ensure the long-term working power of the equipment in rainy days.

That is, in most sunny conditions, the equipment is mainly powered by solar panels and supercapacitors, and in a few rainy days and other bad weather conditions, the equipment is mainly powered by large-capacity batteries; this design greatly reduces the battery life. The number of times of work will greatly extend the working life of the battery.

The storage battery described here can be various lithium batteries, nickel-metal hydride batteries, or lead-acid storage batteries.

Among them, the solar panel can be combined with conventional solar panels according to the rated power or voltage of the electrical equipment; the battery can be a lead-acid battery or various lithium batteries, nickel-metal hydride batteries; the battery charging circuit is a solar battery that matches the battery. Charging circuit; the supercapacitor can be a single supercapacitor or a combined capacitor group composed of single supercapacitors in series or in parallel or in combination. Capacitor matching solar charging circuit.

Both the storage battery and the supercapacitor are connected to the power conversion circuit through a voltage comparison circuit, and then converted into power energy supply suitable for electrical equipment through the power conversion circuit. Among them: the voltage comparison circuit connects the storage battery and the supercapacitor to the power conversion circuit at the same time, and automatically switches according to the voltage or capacity of the two, so as to realize that the supercapacitor mainly supplies power to the electrical equipment in sunny weather, and in rainy days, etc. In bad weather, the battery will automatically supply power to the electrical equipment; the power conversion circuit should match the electrical equipment, which can be either a DC/DC circuit, a DC/AC circuit, or a combination of the two.

Charging process: The solar panel charges the battery and the supercapacitor separately. The conventional design is that the voltage of the supercapacitor is higher than the battery voltage after being fully charged; the output power of the solar panel is greater than the power consumption of the electrical equipment. The battery board can not only supply power for electrical equipment, but also charge supercapacitors and batteries.

Discharging process: When the light is not good and the output power of the solar panel is less than the power consumption of the electrical equipment, the electrical equipment needs to be powered by a super capacitor or battery; since the voltage of the super capacitor is higher than the voltage of the battery, the super capacitor is discharged first , when the voltage of the supercapacitor is discharged close to the battery, the battery starts to discharge, and the discharge time ends until the next charging cycle when the illuminated solar panel starts to charge.

Claims (2)

1. A solar powered device utilizing a supercapacitor to prolong the life of a storage battery, characterized in that it comprises a solar panel, and the solar panel is connected to the storage battery and the supercapacitor through a battery charging circuit and a supercapacitor charging circuit respectively, and the storage battery and the supercapacitor are compared by voltage The circuit is connected to the power conversion circuit, and the power conversion circuit is connected to the electrical equipment. 2. The solar power supply device utilizing a supercapacitor to prolong battery life according to claim 1, wherein the voltage of the supercapacitor is greater than the voltage of the battery.